Why Q345B Seamless Steel Pipe Is Widely Used In Automobiles

So far, China has not yet formed a systematic national standard and industry standard for the complete Q345B seamless steel pipes, so it is difficult to compare domestic and foreign similar products with product quality requirements. In order to develop the production of precision welded pipe as soon as possible and to meet the needs of national economic development, it is necessary to formulate relevant Q345B seamless steel pipe from product specifications in accordance with the standards of similar foreign products in combination with some domestic pipe products with higher quality requirements and user requirements. The dimensional accuracy, chemical composition, mechanical properties, weld quality, appearance, and surface quality all have stringent requirements.

It is necessary to formulate a complete system of national and industry standards to meet the various requirements of precision welding pipe products. With the development of China's welded pipe production, China's precision welded pipe production has also been a certain development, but so far, China has not yet formed a systematic national standard and industry standard for a complete Q345B seamless steel pipe, it is difficult to make similar products at home and abroad in product quality requirements. Compare. The price of Q345ADCE seamless steel pipe market vibrancy seamless steel pipe is calculated based on the standard of 0.32 tons of steel consumption driven by investment per ten thousand yuan in railway construction. It is expected that the annual demand for railway construction steel in China will remain at 16 million tons in the first three years of the "Twelfth Five-Year Plan" period. 18 million tons will be reduced to about 14 million tons in the latter two years.

What is the unique characteristic of Q345B steel pipeJudging from the varieties, railway steels mainly include steel for road use, steel for sleeper use, steel for bridges, steel for infrastructure such as railway stations, steel for electrified railways, etc., accounting for about 0.7% of the total steel products, accounting for the total amount of total crude steel in the country. About 0.8%. Railway rolling stock. The steel for rolling stock of railways is also a potential big market. High-speed rail locomotive car body materials are generally divided into carbon steel, weathering steel, stainless steel, aluminum alloy 4 kinds. Considering the vehicle weight, speed, service life, and maintenance cost, carbon steel cars and weather-resistant steel cars are rarely used nowadays. They are generally stainless steel and aluminum alloy cars. Stainless steel is suitable for passenger car body, because it has excellent corrosion resistance and rust resistance, so that the car body plate eliminates the coating process, and can greatly save maintenance costs.Superior performance of Q345B steel pipe compared with other steel pipes.

Compared with seamless casing, stainless steel does not need to consider the corrosion protection layer, so it can reduce the thickness of the plate, which is beneficial to the lightweight of the vehicle body, so as to save energy and reduce exhaust emissions. At present, the commonly used stainless steel body is mainly austenitic stainless steel SUS304 and SUS301L. If the vehicles are all made of SUS304 stainless steel, the vehicle weight can be reduced by 1 to 1.5 tons. It is reported that the demand for railway passenger cars nationwide is 1,500, of which 200 are high-speed passenger cars, and the total demand for EMUs with a speed of over 200 kilometers per hour is 800. EMU trains are divided into two groups of eight and 16 groups, according to an average of 10 EMUs to calculate, a total of 8000 cars.

The high-speed passenger trains generally consist of 16 festivals and a total of 3,200 cars, which together have a total of 11,200 cars. According to the calculation of each half of the alloy car and the stainless steel car, the total amount of steel used for the car body can reach 220,000 tons, of which stainless steel is approximately 40,000 tons. The bidding for the Q345B seamless steel pipe of the China Railway Corporation includes 726 passenger cars, which is about half of the passenger car demand in 2012. In addition, there are also 28,900 trucks with a considerable amount of steel for the body.

A worker from a steel pipe company, which is located in China.